Tripping device.



c. e. SPRADO. TRIPPING DEVICE.

APPLIOATION IILIBD DEILZB. 1905.

Batented June 1, 1909.

I I I I l I ll! r0 GOVERNOR .FFFL

imam uiU WITNESSES."

INVEATTOR T flcoi'ninencin r at a variable uoint'.

stars PATENT ora ion.

cam. e. sraaoo, or MILWAUKEE, wrsii'oit's'iu, ASSIGNOR TO ALus-cHALMERs COMP-ANY,

- or MIl'iW.-\U1\ZEE,WISCONSINA CORPORATION or NEW JERSEY.

Toall whom it may concern:

'Beit known that I, CARL G. SPRADO, a cititfn of the United States, residing at Milwaukee, 111 the county of Milwaukee and State of '1 1 Wisconsin, have invented certain new and usclul lmprovements 1n Tripping Devices;

ofwhich the following is a specification.

'llns invention relates to tr pping devices. This lnventlon has utility when applied to de\;'i ces which arejto be' variably operated in intent of motion and a x'ariable distance lhls con-' dition is met in valve control of the admission of fluid to motors in cases where the vialveis tripped at about the same point in the engine cycle. N It is found to be desirable at some times to operate valve mechanismf asj forexample, l the admission valve "mechanism" of gas n engines, in such'a way that tli'evalve may be "opened at difi'erenttimes with respect to the stroke of the engine while, no matter what its time of opening maybe, 'itstime of closing :1 shall be substantially constant with respect to'the stroke of the engine. v

Theapparatus disclosed by the drawings accompanying this specification is a valve mechanism adapted to be operated under and in accordance with the principles of operation just stated' w. Referring to the drawings, l igure 1 shows [devices for valve control.

avertical' section of an embodiment of the Fig. 1' is a similar "view showing the parts in a different position. ,The driven member or valve 1 (the end of which only is shown) is engaged by the hook "(at the reci rocable element 2. The element Zis' yielda ly held over so that its book will I engagewith the member 1 by the spring 3.

The element, 2 may bev thrown pverby the in'4 so that as the element reclprocates its ook will not engage the member 1.

'lhc elementf2 is pivote on the pivot-pin 5 carried by the floating link .or' lever 6. The

lever 6 has an extensionor arm 7 in whit-his;

pivotally mounted a second tripping device 8 which has the manually adjustable engaging face 9. To properly guide the member 8, it is mounted in sliding engagement within the pivoted box 10. Mounted on the pivot 5 is the link 11. having its other end mounted in the fixed frame 12. This link serves to guide the element 2 in its rcciprocations. Mounted on the fixed pivot 13 carried by the frame 12 is the link 14 having a shoe or face which Specification of, Letters Patent. i

' emeritus Davies.

" asted June 1 909.

plioanon fiiewov-em erza, 1905; Serial No. 293,531.

engages the under side-of the floating lever 6. Connected to the free end of the link 1'4 isthe link 15. Mounted on the pivot pin 16 can ried by the frame 12 is the bell crank lever 17 engaging the link 15'- with one of its arms,

which leads to the governor or some speed regulating device. The fioatinglever Ghas the link 19 connectedthereto whichmay be regularly reciprocated, as byan'ccentric'l The trip 4 may be manually operated bythe valve 1 against its seat in the frame 12; In operation, with the rod 19 at its upward limit of movement, the parts will be in the position shown in F ig.-,1 with the pivoted reshown in Fig. 2. The pin 9 of the element 8 is shown in the positiorrof.tripping the element 2, thereby permitting the member 1 to be forced down by the spring 21.

In.regular operation of the rod 19, the time ofbeginning of lift of the member 1 may be varied by the action of the re ulator through thefloating link or lever 6 which rests upon lever 6 in raising the element "However, this variation of'the fulcrum of lcvcr 6', while. chan ing the time of beginning of lift of .n'iem er I that when the hook of "element 2 begins to engage, practically does not affect the time of trip owing to the particular form of the tripping device S'anil the manner in which this-trippingjileyice is mounted The opening of the valve occurs at a variable point of the inlet stroke because of the varii able position of the link 14 as determined by the governor. The closing of the'valve occurs at substantially a constant point of the inlet stroke because of the compensation afforded by the'backing away from element 2 of the engaging face 9 of the tripping means 8 by its being caused by box 10 to swin about its pivotal mounting on lever 6; suc compensation being on account of the sooner approach, ihr'ing operation, of such pivotal mounting to the upper end of element its other arm being connected to' the link 18' theshoe of the regulator;actuated link 1 1 which link 14 serves as a movable fulcrum foi:

'handle 20. The spring 21 normally forces the driven. member or dash pot piston'of the 1 the elements are brought into 'the'position dent or ofdecrease of the load upon the eninc.

What is claimed and it is desired to secure by LettersPatent is:

1. The combination with a valve of means for moving said valve in one direction, a reci rocable element' provided with a hook a a ted to engage with said valve for moving sai valve .in the opposite direction, a floating lever secured to said reci rocable element, a pivoted movable lin supporting said floating lever, means for operating said floating lever,- and means carried by said floating lever and in engagement with a fixed part and adapted to engage with said reciprjacable element to disengage said reciprocable element from said valve.

' 2;The combination with a valve of a" 'frame in which said valve 1S mounted and with respect'to which said valve is adapted to be reciprocated, a spring for movin said valve in one direction, a reciprocable e ement pmvided With a hook adapted to engage with saidvalvefor moving it in the opposite'direetion, a floating lever to which said reciprocable element is pivotally united, a movable link Hivoted to the'casing and su porting said eating lever, means to rock said fioatinglever iio'n said link, a spring engaged with sai reciprocable element and said floating lever to retain the hook of said reci rocable element in engagement with sai valve, and means carried by said floating lever and adapted to engage with said rcci rocable element to release said reciproca le element from said valve.

3. The combination with a valve.of a

'frame in which said yalve is mounted and with respect to which said valve isadaptcd to be' reciprocated, a spring for reciprocating said-valve in one direction, a reciprocable element rovided with a hook adapted to engage wit 1 said valve for moving it in the opposite direction, a floating lever to which said reci iocablc element is pivotally united,

with respect to which said valve is adapted to bcrcciprocated, a spring for reciprocating said valve in one direction, a rccipi'ocable element provided with a hook adapted to engage with said valve for moving it in the oppositc direction, a floating lever to which said reciprocable element is pivotally united,

a inovab a link pivoted to the casing and supporting said floating lover, means to rock said floating lever upon said link, a sprin enga ed with said rcciprocable element and said floating lever to retain tliehook of said reci )rocable element in engagement with sair. valve, means pivoted to said floating lcver and pivotally and slidably engaged with said casing to release said reciprocablc elemerit from 'Silkl valve, and means to swing said'reciprocable element about its pivot to prevent its on aging with saidvalve.

5. The com iiiiatioii with a valve of means for moving said valve in one direction a movable element engageable with said valve for moving same in the opposite direction, a floating lever se'ciiied to said movable element, an adjustable link siipportin said floating lever, means for operating sair floating lever, and meanscarried by said floating lever and movable thereon and'adapted to engage with said movable element to disenga e same fromsaid valve.

11 testimony wlieieofl aflix my signature in presence of, two witnesses CARL G. SPRADO.

Witnesses;-

JOHN DAY, J12, Geo- E. KIRK. 

